Structural and electronic transformation pathways in morphotropic BiFeO3

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Phase boundaries in multiferroics, in which (anti-)ferromagnetic, ferroelectric and ferroelastic order parameters coexist, enable manipulation of magnetism and electronic properties by external electric fields through switching of the polarization in the material. It has been shown that the strain-driven morphotropic phase boundaries in a single-phase multiferroic such as BiFeO3 (BFO) can exhibit distinct electronic conductivity. However, the control of ferroelectric and phase switching and its correlation with phase boundary conductivity in this material has been a significant challenge. Supported by a thermodynamic approach, here we report a concept to precisely control different switching pathways and the associated control of electronic conductivity in mixed phase BFO. This work demonstrates a critical step to control and use non-volatile strain-conductivity coupling at the nanoscale. Beyond this observation, it provides a framework for exploring a route to control multiple order parameters coupled to ferroelastic and ferroelectric order in multiferroic materials
Publisher
NATURE PUBLISHING GROUP
Issue Date
2016-09
Language
English
Article Type
Article
Keywords

THIN-FILMS; PHASE BOUNDARIES; TUNNEL-JUNCTIONS; DOPED BIFEO3; DOMAIN-WALLS; STRAIN; MULTIFERROICS

Citation

SCIENTIFIC REPORTS, v.6, pp.32347

ISSN
2045-2322
DOI
10.1038/srep32347
URI
http://hdl.handle.net/10203/213505
Appears in Collection
PH-Journal Papers(저널논문)
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